Why would PHP-generated Javascript not work in file loaded via AJAX? -

i loading .php file via extjs ajax call this:

menuitemapplication.header.on('click', function() {                  ext.ajax.request({         url: 'content/view_application.php',         success: function(objserverresponse) {             var responsetext = objserverresponse.responsetext;             regioncontent.update(responsetext);             var scripts, scriptsfinder=/<script[^>]*>([\s\s]+)<\/script>/gi;             while(scripts=scriptsfinder.exec(responsetext)) {                 eval(scripts[1]);             }         }     }); }); 

javascript in loaded .php file executes fine:

<script type="text/javascript">      regioncontent.update('changed region content within application view'); </script> 

but if javascript being generated via php, not executed:

<?php echo "<script type=\"text/javascript\">\n"; echo "regioncontent.update('changed region content within application view')';\n"; echo "</script>\n"; ?> 

yes responses same, seen in firebug net panel, here javascript works:

and here php-generated javascript, does not work:

how can php-generated javascript execute?

those responses aren't same. check '; versus ; @ end there.

<?php echo "<script type=\"text/javascript\">\n"; echo "regioncontent.update('changed region content within application view')';\n"; echo "</script>\n"; ?> 

versus

<?php echo "<script type=\"text/javascript\">\n"; echo "regioncontent.update('changed region content within application view');\n"; echo "</script>\n"; ?>